When to perform Umrah

Slmz Mufti,
My son is living in Jeddah and we intend visiting him during the Dec holidays. We intend spending are few days with his family.My question is should we be in Ihraam whilst at his place or can we put on Ihraam when we leave his place to perform Umrah. The other alternative is to go Medina from Jeddah and then perform Umrah from Medina. What do you suggest

Make intention of going to Madinah first.
Stay with him in Jeddah, then go to Madinah.
Then from Madinah go and perform Umrah.
Go back to Jeddah and stay with him.
Whenever you want to then perform Umrah.
Adorn Ihraam from his home.